xarray.core.rolling_exp.RollingExp

class xarray.core.rolling_exp.RollingExp(obj, windows, window_type='span')

Exponentially-weighted moving window object. Similar to EWM in pandas

Parameters

• obj (Dataset or DataArray) – Object to window.

• windows (mapping of hashable to int) – A mapping from the name of the dimension to create the rolling exponential window along (e.g. time) to the size of the moving window.

• window_type ({"span", "com", "halflife", "alpha"}, default: "span") – The format of the previously supplied window. Each is a simple numerical transformation of the others. Described in detail: https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.ewm.html

Returns

RollingExp

Return type

type of input argument

__init__(obj, windows, window_type='span')

Initialize self. See help(type(self)) for accurate signature.

Methods

__init__(obj, windows[, window_type])	Initialize self.
mean([keep_attrs])	Exponentially weighted moving average